Question

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Answer 1

Answer:

a27= -121

s10= 45

Step-by-step explanation:

A27=9 +(26)(-5)

      =9-130

      = -121

S10=Sum of 10 terms of AP = 10/2[2(9) + (9)(-5)]

     =5(18)-45

     =90-45

     =45

Answer 2

• 27 term = 9+(27+1) × -5
• 27 term = 9 - 140 = -131 answer