If “a” is the first term and ℓ is the last term (nth term), then the sum of all the term of this sequence is given by:
Find the sum of first hundred even natural numbers which are divisible by 5.
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If the 10 times of the 10th term of an AP is equal to 15 times to the 15th term, then the 25th term is:
Find the missing number. 1, 4, 9, 16, 25, 36, 49, (....)
The first negative term of the A.P.62,57,52…. is the
How many terms of the series 24,20,16,…are required so that their sum is 72?
Roots of quadratic equation x^{2} – 3x = 0 , will be
The number of terms in the sequence 17, 10, 3,…., 144 is:
Three terms in A.P. are such that their sum is 45. What is the middle term?
The terms of an A.P. are doubled, then the resulting sequence is
209 videos443 docs143 tests

209 videos443 docs143 tests
