Question

1,4,7,10...what is the 11th term in the sequence? What is the sum of the first eleven terms?

Answer 1

T¹¹ = a+10d

T¹¹ = 1+10×3 = 1+30 = 31

(b) sum of first eleven terms :-

Sum of n terms = n/2(a+lastterm)

so,

11/2 (32)=11×16=176 ANSWER

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