AP - simple

Find the first nine elements of the sequence if a10 = -1 and d = 4

Correct answer:

a9 =  -5
a8 =  -9
a7 =  -13
a6 =  -17
a5 =  -21
a4 =  -25
a3 =  -29
a2 =  -33
a1 =  -37

Step-by-step explanation:

a10​=−1 d=4  a9​=a10​−d=(−1)−4=−5
a8​=a9​−d=(−5)−4=−9
a7​=a8​−d=(−9)−4=−13
a6​=a7​−d=(−13)−4=−17
a5​=a6​−d=(−17)−4=−21
a4​=a5​−d=(−21)−4=−25
a3​=a4​−d=(−25)−4=−29
a2​=a3​−d=(−29)−4=−33
a1​=a2​−d=(−33)−4=−37

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