MEDIUM
11th West Bengal Board
IMPORTANT
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A manufacturer reckons that the value of a machine which costs him ₹ 31250, will depreciate each year by 20%. Find the estimated value at the end of 5 yrs. (write the answer in ₹.)

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Important Questions on Sequence and Series

MEDIUM
11th West Bengal Board
IMPORTANT
WBCHSE Mathematics for Class 11>Chapter 9 - Sequence and Series>EXERCISE 7H>Q 1
Find two positive numbers a and b whose A.M and G.M are 25 and 20 respectively.
MEDIUM
11th West Bengal Board
IMPORTANT
WBCHSE Mathematics for Class 11>Chapter 9 - Sequence and Series>EXERCISE 7H>Q 2
Find two positive numbers a and b whose A.M and G.M are 10 and 8 respectively.
EASY
11th West Bengal Board
IMPORTANT
WBCHSE Mathematics for Class 11>Chapter 9 - Sequence and Series>EXERCISE 7H>Q 3
Find G.M between the numbers 0.15 and 0.0015.
EASY
11th West Bengal Board
IMPORTANT
WBCHSE Mathematics for Class 11>Chapter 9 - Sequence and Series>EXERCISE 7H>Q 3
The G.M between the numbers a3b and ab3 is a2bk, then find the value of k.
EASY
11th West Bengal Board
IMPORTANT
WBCHSE Mathematics for Class 11>Chapter 9 - Sequence and Series>EXERCISE 7H>Q 4
Insert two numbers between 9 and 243 so that the resulting sequence is a G.P.
MEDIUM
11th West Bengal Board
IMPORTANT
WBCHSE Mathematics for Class 11>Chapter 9 - Sequence and Series>EXERCISE 7H>Q 5
Insert three numbers between 13 and 432 so that the resulting sequence is a G.P.
MEDIUM
11th West Bengal Board
IMPORTANT
WBCHSE Mathematics for Class 11>Chapter 9 - Sequence and Series>EXERCISE 7H>Q 6
Insert four numbers between 6 and 192 so that the resulting sequence is a G.P.
HARD
11th West Bengal Board
IMPORTANT
WBCHSE Mathematics for Class 11>Chapter 9 - Sequence and Series>EXERCISE 7H>Q 7
The A.M between two positive numbers a and b a>b is twice their G.M. Prove that a:b=(2+3):(2−3).