If the common difference is negative, so each term in the sequence will be smaller than the previous one. Therefore, each term in the sequence will be smaller than the previous one and the sequence will be a decreasing AP. NCERT books Arithmetic Progressions Solutions for Class X Maths is easy to solve. Provide the simpler solution of EXERCISE 5.1 of CBSE Board and Others state Board NCERT Book.
Write first four terms of the AP, when the first term a and the common difference d are given as follows: a = – 1.25, d = – 0.25
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a = – 1.25, d = – 0.25
First term a₁ = a = -1
Second term a₂ = a₁ + d = – 1.25 – 0.25 = – 1.50
Third term a₃ = a₂ + d = – 1.50 – 0.25 = – 1.75
Fourth term a₄ = a₃ + d = – 1.75 – 0.25 = -2.00