Question

a) If the 6 term of an A.P. is 46, find the sum of first 11 terms.​

Answer 1

Step-by-step explanation:

A(6) = 46

a + 5d = 46 -------(1)

Sn = n/2 {a + An }

S(11) = 11/2{a + A(11)}

= 11/2 {a + (a + 10d)}

= 11/2 { 2a + 10d}

= 11/2 { 2(a + 5d)}

= 11/2 {2 * 46} {equation (1) से }

= 11 * 46 = 506

Answer 2

Answer:

please refer to the attachment

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